Fan base



FIG. 1 is a front, left, top perspective view of the fan base of FIG. 1;

FIG. 2 is a front, right, bottom perspective view of the fan base of FIG. 1;

FIG. 3 is a right elevation view of the fan base of FIG. 1;

FIG. 4 is a left elevation view of the fan base of FIG. 1;

FIG. 5 is a rear elevation view of the fan base of FIG. 1;

FIG. 6 is a front elevation view of the fan base of FIG. 1;

FIG. 7 is a bottom elevation view of the fan base of FIG. 1; and,

FIG. 8 is a top elevation view of the fan base of FIG. 1.

The broken lines represent environment that forms no part of the claim. 

CLAIM The ornamental design for a fan base, as shown and described. 